单项选择题

A．Go through a health check.
B．Carry little luggage.
C．Arrive early for boarding.
D．Undergo security checks.
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单项选择题
The vast majority of the world’’s earthquakes are mild.
A．Y
B．N
C．NG
单项选择题
In the author’’s view, higher service standards are impossible in Israel ________.
A．if customer complaints go unnoticed by the management
B．unless foreign companies are introduced in greater numbers
C．ff there’’s no competition among companies
D．without strict routine training of employees
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